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Joint Office of Gas Transporters Uniform Network Code – Validation Rules Page 1 of 26 Version 2.9 Uniform Network Code Validation Rules Version 2.9 DRAFT Updates required as a result of Modification 0432 & 0434 All rights reserved. No part of this document may be reproduced, stored or transmitted without the written permission of the Transporters.

Network Code Validation Rules v2.9 CLEAN... · Uniform Network Code – Validation Rules Page 5 of 26 Version 2.9 1 Introduction This is the document referred to in Section M 5.3

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Page 1: Network Code Validation Rules v2.9 CLEAN... · Uniform Network Code – Validation Rules Page 5 of 26 Version 2.9 1 Introduction This is the document referred to in Section M 5.3

Joint Office of Gas Transporters Uniform Network Code – Validation Rules

Page 1 of 26 Version 2.9

Uniform Network Code Validation Rules

Version 2.9 DRAFT

Updates required as a result of Modification 0432 & 0434

All rights reserved. No part of this document may be reproduced, stored or transmitted without the written permission of the

Transporters.

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Document Control

Version Date Reason for Change 2.9 DRAFT 23/10/2015 Updated Appendix A to remove

negative ‘Round the Clock’ indicator. Version approved by PN UNC for submission to November UNCC.

2.8 DRAFT 17/08/2015 Included process flow under Appendices

2.7 DRAFT 28/07/2015 Added validation ‘groupings’. Under Section 1.9

2.6 DRAFT 10/06/2015 Updates to correct references & amendments to Section 5

2.5 DRAFT 29/04/2015 Updates following further analysis and discussions at Project Nexus workgroup & agreement on the read validation tolerances.

2.4 DRAFT 20/11/2013 Proposed updates for review at PN UNC

2.3 DRAFT 15/10/2013 Further updates following review 2.2 DRAFT 07/10/2013 Further updates following review

at PN UNC on 30/09/2013 2.1 DRAFT 20 September

2013 Updates following Project Nexus requirements

2.0 20 January 2011 Clause 4 amended as a result of implementation of UNC0224, introduction and Document Control added.

1.0 05 July 2006 Rules established Development of Rules

(a) Section M5.3.3 of the Transportation Principal Document (TPD) of the Uniform Network Code (UNC). specifies that:

“The "Uniform Network Code Validation Rules" (or “Validation Rules”) are the rules and procedures contained in the document issued by the Transporters at the [Project Nexus Implementation Date] and so entitled and governed and amended in accordance with Section V12 unless the Authority shall upon application by any User made within one month after such notice, give Condition A11(18) Disapproval to the Transporters making any amendment in accordance with the provisions of Section V12.”

(b) The requirement to publish the Uniform Network Code Validation Rules is specified in Section V12.1(b) of the TPD of the UNC. This section also provides for the document to be published and revised from time to time. The provision (TPD V12.2) reads :

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“Each Document shall be kept up to date and published by the Transporters on the Joint Office of Gas Transporters’ website.”

(c) The Rules set out below meet the Transporters’ obligation to prepare Guidelines, while the Document Control Section records changes which have been made to the Guidelines. The document is published on the Joint Office of Gas Transporters’ website, www.gasgovernance.com.

(d) These Guidelines can only be modified in accordance with the requirements set out in paragraph 12 of Section V of the UNC Transportation Principal Document, which reads as follows:

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CONTENTS 1. Introduction. . . . . . . . . 05 2. Meter Reading Validation. . . . 06 3. Validation on Reads received as part of an Asset Update 08 4. Class 1 DM Supply Points. . . . . . . 09 5. Unique Sites . . . . . . . . 10 6. Consumption Adjustments . . . . . 11 7. Validation to Site Visit Reads . . . . . . 12 8. Tolerances Ranges . . . . . . . 14 Appendix A - Round The Clock Indicators . . . . 16 Appendix B - Calculated Gas Card Readings. . . . . 18 Appendix C – MRA HHT Validation 21 Appendix D: Read Validation Process Flow

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1 Introduction

This is the document referred to in Section M 5.3 of the Uniform Network Code Transportation Principal Document. It does not form part of the Uniform Network Code.

1.1 This document describes the validation rules which will be applied to non-daily (Class 3 and 4) and daily metered (Class 1 and 2) Supply Meter Point meter reads, read equipment, convertor readings and associated data before they are applied to User and Transporter systems. All parameterised values are subject to amendment in accordance with the procedures set out in Section M 5.3.3 of the Uniform Network Code – Transportation Principal Document. Any changes will be notified to Users.

1.2 These rules are the minimum requirement of validation that must be undertaken for readings applied by Users prior to submitting to the Transporter.

1.3 Reads from Class 1 daily metered Supply Meter Points will be validated by the Transporter in accordance with the relevant rules described herein.

1.4 Reads from Class 2, 3 & 4Supply Meter Points must be validated by the Users before submitting to the Transporter in accordance with the relevant rules described herein.

1.5 Reads that do not pass the validations described will be rejected by the Transporter with the relevant rejection reason

1.6 The validation described in this document will be in addition to that used to determine that the data is in accordance with the file specification and system requirements.

1.7 The validation refers to cyclic and non-cyclic meter readings, including transfer readings, consumption adjustments and asset removal meter readings.

1.8 In addition to User validation, the Transporter will undertake a two step validation process for all reads and consumption adjustments received;

1.8.1 An initial tolerance check (Inner Tolerance) that can be overridden by the User. The override flag can be submitted with the read or on re-submission of the read following rejection.

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1.8.2 The second test (Outer Tolerance) will be applied if the read or consumption adjustment passes the Inner Tolerance check. Where the read or consumption adjustment fails this test the read will be rejected and can not be overridden.

1.9 On submission of the read communication by the Shipper, the GT will perform a set of validations based on 3 groupings and in the following order:

Set 1: Read Submission

- read received within the read submission timescales, including the transfer reading (Opening read) and Check Read

- an actual read can not be replaced for Class 1 and 2 meter points

Set 2: Asset

- all expected reads are received e.g. corrected and uncorrected reads where a Convertor is recorded

- meter point status is ‘Live’ and asset status must not be ‘Removed’

- asset serial number matches the serial number held (fuzzy match)

- reading provided must equal the number of dials and digits recorded for the asset

Set 3: Read Validation

- Read validation tolerances

- Convertor tolerance check

- for replacement reads, a read exists for the same date on UKLink

- for replacement reads, the Shipper submitting the read was the registered Shipper on the date of the read

- for replacement reads, the read is not within the period of a consumption adjustment

- for replacement reads, the read is not within the Check Read period

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For each group all relevant validations will be performed and rejections provided in the notification to the Shipper.

If the read submission fails the first set of validations “read submission”, all relevant checks will be performed and any that fail the validations will be notified to the Shipper i.e. if there is more than one failure reason all will be communicated to the Shipper via the relevant rejection code.

Where any failures are recorded the next set of validations “Asset” will not be executed.

If the “read submission” validations pass, the second set “Asset” will be performed. All relevant checks for that set of validations will be performed and any that fail the validations will be notified to the Shipper.

Where any failures are recorded the next set of validations “Read Validation” will not be executed.

All rejections in each set of validations will be notified to the Shipper.

If both the “Read Submission” and “Asset” validations have passed the third set of validations “Read Validation” will be performed.

Only where all 3 sets of validations have passed will the read be accepted.Process flow included under Appendix D.

Note: Please refer to the appropriate rejection codes for the complete list of read rejections.

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2. Meter Reading Validation

2.1 A completeness check to ensure all readings expected have been received, including Convertor readings where a Convertor is installed.

2.2 All meter readings will be subjected to a round the clock test to detect possible instances where a meter has made a complete revolution of the dials between readings. It will also check for negative consumptions if a meter reading follows an estimate.

The term Round the Clock (RTC) refers to the number of times the meter or convertor has gone "through the zero's" e.g. has moved from 9999 to 0001. The use of this indicator and the reading will permit the volume of gas to be calculated as well as detecting any reversal of readings following an earlier erroneous reading. A detailed explanation of the logic is given in Appendix A.

2.3 Validation to ensure the read is equal to or greater than a previous actual reading, and for replacement reads, less than or greater than a subsequent actual read.

2.4 All readings supplied by Users, including reads received as an asset update and replacement reads, will be subject to tolerance checking as described below.

2.5 An inner Tolerance validation will be applied to all reads as described in Section 8

2.5.1 The User may ‘override’ the ‘Inner Tolerance Check’ by indicating as such when submitting the reading.

2.5.2 A further tolerance check (Outer Tolerance check) will be applied, a reading that breaches the Outer Tolerance check will be rejected by the Transporter.

2.5.3 Tolerance ranges will be based on the AQ band for a Supply Meter Point. Tolerance Ranges are shown in Section 8.

2.6 The tolerances will be applied using the previous Actual meter read, including an installation read, or an estimated transfer read

2.7 Where a Convertor is installed additional checks will be performed to ensure that the Convertor is reading meter pulses correctly. The following checks will be performed. The following will not be applied to a variable Pressure site.

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2.7.1 Calculate; (Convertor Corrected Volume / Meter Read Volume) / Meter Point

Correction Factor 2.7.2 A Convertor Tolerance check will be applied on the ‘Ratio’

between the Convertor reads and meter reads: Ratio = Vol 1 / Vol 2 / Meter Correction Factor Where; Vol 1 = Volume calculated using Convertor corrected reads Vol 2 = Volume calculated using Convertor uncorrected reads, or

meter reads if uncorrected reads are not available 2.7.3 The tolerance ranges are: Class 1 & 2 meter points: 0.95 to 1.05 Class 3 & 4 meter points: 0.85 to 1.15 2.8 Reads sumitted as part of an asset update will be subject to read

validations with the exception of installation reads. 2.9 Replacement reads will only be accepted if a read for the same date is

recorded on UKLink. 2.10 For Class 1 & 2 meter points where an actual is received following an

estimated transfer read the following will apply:

2.10.1 On receipt of the actual read it will be validated to ensure equal to or greater than the previous actual read.

! If yes, accept the actual read ! If no, reject

! 2.10.2 Where the actual read is equal to or greater than the previous actual read will be accepted even if the energy is a negative following the estimated transfer read

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3. Validation on Reads received as part of an Asset Update

3.1 The read submitted as the removal read will be validated against the ‘Outer Tolerance’ check. If the read fails the tolerance, the asset update will be rejected.

3.2 An asset removal will be rejected if actual reads exist after the effective

date of the asset removal.

3.3 If the asset is recorded as ‘Isolated’, reads will not be accepted for a read date after the effective date of the asset update.

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4. Class 1 DM Mandatory Supply Points

The following additional tests to those described herein will be performed by the Transporter.

4.1 A completeness test to ensure that all the readings expected have been received.

4.2 An instrument configuration test i.e. to ensure that the convertor and the meter reading are received where a convertor is fitted.

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5. Unique Sites

The meter read tolerance validation described in Section 8 will be performed on the portfolio of Supply Meter Points known as unique sites with the exception of NTS & LDZ Telemetered Supply Meter Points.. The Supply Meter Points that are currently known as unique sites are;

! All NTS sites including Direct Connect sites, Connected System Operator (CSO) sites and Shared Supply Meter Points

! NTS Interconnectors ! LDZ Telemetered sites ! LDZ Connected System Operator (CSO) sites ! LDZ sites with NTS Optional Rate and/or LDZ Optional Rate ! LDZ Shared Supply Meter Points ! LDZ Site with Specific Calorific Values (CV) ! LDZ Sites with any Special Metering Arrangements in place

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6. Consumption Adjustments 6.1 A Consumption Adjustment can be submitted for the following reasons;

a. To replace the volume calculated from a meter reading for Class 1 and 2 Supply Meter Points

b. To replace the consumption recorded where the meter is on ‘Bypass’ c. To replace the consumption recorded where there has been a

confirmed theft of gas d. To replace the consumption recorded where there has been a Daily

Read Error e. To replace the consumption recorded where there has been a fault on

the asset 6.2 The period of the consumption adjustment must align to reads recorded

on UKLink 6.3 The total corrected consumption for the period must be submitted. 6.4 Users must validate the Consumption Adjustment for prior to submitting

to the Transporter. 6.5 Where a User submits a Consumption Adjustment the validations and

tolerance ranges described under Section 8 will be applied.

6.6 Where the Consumption Adjustment fails the validations it will be rejected by the Transporter.

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7. Validation to Site Visit Reads (Check Reads)

7.1 Read validation & convertor tolerance checks will be applied over the ‘Check Read Period’. The following will be treated as a ‘Check Read’ where derivable equipment is installed;

- Check Read following a Site Visit

- Installation read where in receipt of the first Check Read

- Shipper transfer reading

- Bypass reading

7.2 The daily average energy between the Check Read period (as defined in 7.1) will be calculated, the daily value will be used to validate against the SOQ for Class 1 and 2 and the AQ for Class 3 & 4. The SOQ/AQ will be the prevailing value for the date of the Site Visit.

7.3 A replacement read will be rejected where the read date falls within the Check Read period (as defined in 7.1)

7.4 The ‘Round the Clock’ indicator should be based on the latter of either the previous Check Read, installation read, bypass reading or the transfer read.

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8. TOLERANCE RANGES 8.1 Tolerances Applicable to Class 1 and 2 Meter Points - Daily Read Received Following an Actual Read Lower AQ

Band (kWh)

Upper AQ Band (kWh)

Tolerances where read will be accepted

Tolerances where a Read will be Accepted if Submitted within

Override Flag (Inner Tolerance)

Outer Tolerance Where Read will be Rejected (Market Breaker)

1 1 0% - 2,000,000% of SOQ 2,000,001% - 7,000,000 % of SOQ >= 7,000,001% of SOQ

2 200 0% - 10,000% of SOQ 10,001% - 25,000 % of SOQ >= 25,001% of SOQ

201 500 0% - 4,000% of SOQ 4,001% - 10,000 % of SOQ >= 10,001% of SOQ

501 1,000 0% - 2,000% of SOQ 2,001% - 5,000 % of SOQ >= 5,001% of SOQ

1,001 5,000 0% - 400% of SOQ 401% - 2,000 % of SOQ >= 2,001% of SOQ

5,001 10,000 0% - 200% of SOQ 201% - 500 % of SOQ >= 501% of SOQ

10,001 20,000 0% - 150% of SOQ 151% - 400 % of SOQ >= 401% of SOQ

20,001 73,200 0% - 300% of SOQ 301% - 600 % of SOQ >= 601% of SOQ

73,201 732,000 0% - 250% of SOQ 251% - 550 % of SOQ >= 551% of SOQ

732,001 2,196,000 0% - 200% of SOQ 201% - 500 % of SOQ >= 501% of SOQ

2,196,001 29,300,000 0% - 150% of SOQ 151% - 450 % of SOQ >= 451% of SOQ

29,300,001 58,600,000 0% - 100% of SOQ 101% - 400 % of SOQ >= 401% of SOQ

58,600,001 and above 0% - 100% of SOQ 101% - 350 % of SOQ >= 351% of SOQ

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8.2 Tolerances Applicable to Class 3 and 4 Meter Points - Read Received Following an Actual Read Lower AQ

Band (kWh)

Upper AQ Band (kWh)

Tolerances where read will be accepted

Tolerances where a Read will be Accepted if Submitted within Override Flag (Inner

Tolerance)

Outer Tolerance Where Read will be Rejected (Market Breaker)

1 1 0% - 2,000,000% of AQ/365 x no. of days

2,000,001% - 7,000,000 % of AQ/365 x no. of days >= 7,000,001% of AQ/365 x no. of days

2 200 0% - 10,000% of AQ/365 x no. of days 10,001% - 25,000 % of AQ/365 x no. of days >= 25,001% of AQ/365 x no. of days

201 500 0% - 4,000% of AQ/365 x no. of days 4,001% - 10,000 % of AQ/365 x no. of days >= 10,001% of AQ/365 x no. of days

501 1,000 0% - 2,000% of AQ/365 x no. of days 2,001% - 5,000 % of AQ/365 x no. of days >= 5,001% of AQ/365 x no. of days

1,001 5,000 0% - 400% of AQ/365 x no. of days 401% - 2,000 % of AQ/365 x no. of days >= 2,001% of AQ/365 x no. of days

5,001 10,000 0% - 200% of AQ/365 x no. of days 201% - 500 % of AQ/365 x no. of days >= 501% of AQ/365 x no. of days

10,001 20,000 0% - 150% of AQ/365 x no. of days 151% - 400 % of AQ/365 x no. of days >= 401% of AQ/365 x no. of days

20,001 73,200 0% - 300% of AQ/365 x no. of days 301% - 600 % of AQ/365 x no. of days >= 601% of AQ/365 x no. of days

73,201 732,000 0% - 250% of AQ/365 x no. of days 251% - 550 % of AQ/365 x no. of days >= 551% of AQ/365 x no. of days

732,001 2,196,000 0% - 200% of AQ/365 x no. of days 201% - 500 % of AQ/365 x no. of days >= 501% of AQ/365 x no. of days

2,196,001 29,300,000 0% - 150% of AQ/365 x no. of days 151% - 450 % of AQ/365 x no. of days >= 451% of AQ/365 x no. of days

29,300,001 58,600,000 0% - 100% of AQ/365 x no. of days 101% - 400 % of AQ/365 x no. of days >= 401% of AQ/365 x no. of days

58,600,001 and above 0% - 100% of AQ/365 x no. of days 101% - 350 % of AQ/365 x no. of days >= 351% of AQ/365 x no. of days

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7 APPENDIX A: 'ROUND THE CLOCK' INDICATORS

REQUIREMENTS AND DEFINITIONS

1. The term 'round the clock' will be used in a single context to denote that a meter or convertor has passed through all its zeros and will not necessarily imply that the meter or convertor has made a complete revolution of all its dials (i.e. more than 10,000 hundred cubic feet (hcf) on a four dial meter, 100,000 hcf on a five dial meter etc).

The indicator is to be used for all meters and convertors but in the remainder of the text the term meter will be used for ease of understanding.

2. This means that in the circumstance for a meter reading in hcf;

2.1 Present Reading 6000

Previous Reading 5000 If the volume passing through the meter is 1,000hcf then the RTC indicator will be 0. If the volume passing through the meter is 1 1,000hcf (because the meter has made one complete revolution of all its dials) the RTC indicator will be 1. Here the meter has gone through the zero's once. If the volume passing through the meter is 21,000hcf (because the meter has made two complete revolutions of all its dials) the RTC indicator will be 2. Here the meter has gone through its zeros twice.

2.2 Present Reading 0999

Previous Reading 9999

If the volume passing through the meter is 1,000hcf then the RTC indicator will be 1 as the meter has gone through the zero's once. If the volume passing through the meter is 11,000hcf (because the meter has made one complete revolution of the dials) the RTC indicator will be 2 as the meter has gone through the zero's twice. If the volume passing through the meter is 21,000hcf (because the meter has made two complete revolutions of all the dials) the RTC indicator will be 3 as the meter has gone through the zero's three times.

NB: A customer reading will be treated as an actual reading for the purpose of this test. The negative consumption indicator will only be used if the previous reading is an estimate.

3. The test to detect whether a meter has made more than one

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complete revolution of its dials will be applied only to 4 dial meters or where the previous reading is an estimate. For meters with 5 or more dials the reading will assumed to have gone forward unless the previous reading is an estimate.

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Appendix B: Calculated Gas Card Readings Note: The following is the obligation of the Users. The Transporter will not be required to carry out the following checks from readings taken from Gas Cards. 1.1 The following refers to the calculation of a Calculated Gas Card

Reading which (subject to compliance with section M5.13) can be used as an ‘Opening Meter Reading’ upon Supply Point Transfer.

1.2. Calculated Gas Card Readings will be subject to the same tests as

detailed in Section 3, Cyclic Meter Readings. 2 Formula 2.1 The Calculated Gas Card Reading shall be calculated in the same units

as the Gas Card Reading from the Gas Card and will be calculated using the following formula:

( ( ( c – b ) / ( b – a ) ) * ( y – x ) ) + y

where: a is the Accumulative Daily Value for first date in the Applicable Sequence. b is the Accumulative Daily Value for last date in the Applicable Sequence. c is the Accumulative Daily Value for the Supply Point Registration Date. x is the First Reading in the Applicable Sequence. y is the Last Reading in the Applicable Sequence.

2.2 No Calculated Gas Card Reading shall be calculated where a = b or

where x = y. 2.3 For Metric calculation (M3) the Calculated Gas Card Reading shall be in

the Range 00000.10 to 99999.90. [Note: The least significant digit is always zero].

2.4 For Imperial calculation (Cubic Feet) the Calculated Gas Card Reading

shall be in the Range 0000.01 to 9999.99. 2.5 The First Reading and Last Reading must be taken from a date within the

six month period prior to the Supply Point Registration Date. 3 Definitions 3.1 Accumulative Daily Value

The value used to provide a seasonal adjustment factor within the formula. Values for the relevant date within the ‘Applicable Sequence’ are determined using the table in Appendix C.

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3.2 Applicable Sequence

The sequence of actual Gas Card Readings used to generate the Calculated Gas Card Reading (by execution of the formula).

3.3 Calculated Gas Card Reading

As defined in Uniform Network Code – Transportation Principal Document Section M1.4.3(h).

3.4 Gas Card Reading

As defined in Uniform Network Code – Transportation Principal Document Section M1.4.3(f).

3.5 First Reading

The first of the actual Gas Card Readings taken within the six month period prior to the Supply Point Registration Date.

3.6 Last Reading

The last of the second, third, fourth or fifth actual Gas Card Readings taken prior to the Supply Point Registration Date within the six month period prior to the Supply Point Registration Date.

3.7 Supply Point Registration Date

As defined in Uniform Network Code – Transportation Principal Document G1.1.5

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CALCULATED GAS CARD READINGS 1 The following table is used to determine the ‘Accumulative Daily

Value’ for application within the formula Table 4:

Month Date Seasonal Factor

Seasonal Factor /

100

Accumulative Daily Value

January 01/01/04 13.80 0.138 0.138 = 0.138 + 0 02/01/04 0.138 0.276 = 0.138 + 0.138 03/01/04 0.138 0.414 = 0.276 + 0.138 “ “

February 01/02/04 13.60 0.136 4.414 = 4.278 + 0.136 02/02/04 0.136 4.55 = 4.414 + 0.136 03/02/04 0.136 4.686 = 4.55 + 0.136 “ “

March 01/03/04 12.20 0.122 8.344 = 8.222 + 0.122 02/03/04 0.122 8.466 = 8.344 + 0.122 03/03/04 0.122 8.588 = 8.466 + 0.122 “ “

April 01/04/04 09.80 0.098 12.102 May 01/05/04 07.10 0.071 15.015 June 01/06/04 04.20 0.042 17.187 July 01/07/04 02.40 0.024 18.429

August 01/08/04 02.40 0.024 19.173 September 01/09/04 04.20 0.042 19.935

October 01/10/04 07.30 0.073 21.226 November 01/11/04 10.30 0.103 3.519 December 01/12/04 12.70 0.127 26.633 January 01/01/05 13.80 0.138 30.581 January 01/01/06 13.80 0.138 60.888 January 01/01/07 13.80 0.138 91.195 January 01/01/08 13.80 0.138 121.502 January 01/01/09 13.80 0.138 151.945 January 01/01/10 13.80 0.138 182.252 January 01/01/11 13.80 0.138 212.559 January 01/01/12 13.80 0.138 242.866 January 01/01/13 13.80 0.138 273.309 January 01/01/14 13.80 0.138 303.616 January 01/01/15 13.80 0.138 333.923 January 01/01/16 13.80 0.138 364.230 January 01/01/17 13.80 0.138 394.673 January 01/01/18 13.80 0.138 424.980 January 01/01/19 13.80 0.138 455.287 January 01/01/20 13.80 0.138 485.594 January 01/01/21 13.80 0.138 516.037 January 01/01/22 13.80 0.138 546.344 January 01/01/23 13.80 0.138 576.651 January 01/01/24 13.80 0.138 606.958

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Appendix C: Meter Reading Agency HHT (On Site) Validation Note: The following is the obligation of the Users. The Transporter will not be required to carry out the following checks.

1 Validation for this input will be performed at the time of data capture on the HHT.

2 The meter reading will be checked to ensure that it is within a specified range either side of an estimated reading. This is known as an Inner Tolerance Range (ITR). The estimated reading will be calculated using the consumption history and the AQ of the meter.

3 If the meter reading input is outside the ITR, the meter reader will be required to re-input the meter serial number. If this number is that on the HHT (the correct meter) then they will be required to re-input the reading. This confirms the accuracy of the first reading or corrects an error on the first attempted input. If the meter number differs a meter exchange will be initiated. Similar checks are to be performed on convertor readings.

4 A check will be made on the number of digits for a meter reading i.e. six digits must be input for a six dial meter. No alteration to the number of dials can be made on the HHT. Any anomalies discovered will be reported as they generally signify meter exchanges.

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Note: The Market Breaker Tolerances would be greater or less than the Override Read Tolerances

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APPENDIX C – CALCULATED GAS CARD READINGS

1 The following table is used to determine the ‘Accumulative Daily Value’ for application within the formula

Table 4:

Month Date Seasonal Factor

Seasonal Factor / 100

Accumulative Daily Value

January 01/01/04 13.80 0.138 0.138 = 0.138 + 0

02/01/04 0.138 0.276 = 0.138 + 0.138

03/01/04 0.138 0.414 = 0.276 + 0.138

“ “

February 01/02/04 13.60 0.136 4.414 = 4.278 + 0.136

02/02/04 0.136 4.55 = 4.414 + 0.136

03/02/04 0.136 4.686 = 4.55 + 0.136

“ “

March 01/03/04 12.20 0.122 8.344 = 8.222 + 0.122

02/03/04 0.122 8.466 = 8.344 + 0.122

03/03/04 0.122 8.588 = 8.466 + 0.122

“ “

April 01/04/04 09.80 0.098 12.102

May 01/05/04 07.10 0.071 15.015

June 01/06/04 04.20 0.042 17.187

July 01/07/04 02.40 0.024 18.429

August 01/08/04 02.40 0.024 19.173

September 01/09/04 04.20 0.042 19.935

October 01/10/04 07.30 0.073 21.226

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November 01/11/04 10.30 0.103 23.519

December 01/12/04 12.70 0.127 26.633

January 01/01/05 13.80 0.138 30.581

January 01/01/06 13.80 0.138 60.888

January 01/01/07 13.80 0.138 91.195

January 01/01/08 13.80 0.138 121.502

January 01/01/09 13.80 0.138 151.945

January 01/01/10 13.80 0.138 182.252

January 01/01/11 13.80 0.138 212.559

January 01/01/12 13.80 0.138 242.866

January 01/01/13 13.80 0.138 273.309

January 01/01/14 13.80 0.138 303.616

January 01/01/15 13.80 0.138 333.923

January 01/01/16 13.80 0.138 364.230

January 01/01/17 13.80 0.138 394.673

January 01/01/18 13.80 0.138 424.980

January 01/01/19 13.80 0.138 455.287

January 01/01/20 13.80 0.138 485.594

January 01/01/21 13.80 0.138 516.037

January 01/01/22 13.80 0.138 546.344

January 01/01/23 13.80 0.138 576.651

January 01/01/24 13.80 0.138 606.958

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Appendix D: Read Validation Process Flow